Crinoid Stem Fossil
Crinoidea (Class) - Calcium Carbonate (CaCO3)
fossil
Category
Sedimentary (Fossil)
Browse sedimentary (fossil) specimens identified by the Rock Identifier community.
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Fossil Shark Tooth
Otodus sp. (possibly Otodus obliquus)
fossil
Crinoid Stem Fossil
Class Crinoidea (Echinodermata)
fossil
Shark Tooth Fossil
Elasmobranchii dentition (fossilized)
fossil
Honeycomb Coral Fossil
Favosites (extinct genus of tabulate coral)
fossil
Crinoid Stem Fossil
Crinoidea (Class)
fossil
Coral Fossil (Hexagonaria)
Hexagonaria sp. (Silica-replaced)
fossil
Shale
Shale
sedimentary
Fossilized oyster shell
Bivalvia; likely an oyster (Ostreidae), partly mineralized with calcite
fossil
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Polished white marble
Recrystallized calcite, primarily CaCO₃
metamorphic
Limestone
Limestone (Calcium Carbonate, CaCO3)
Sedimentary
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Sandstone or Limestone
Arenite or Calcareous Sedimentary Rock
Sedimentary
Fossiliferous limestone, likely coral or shell fragment
Calcitic limestone (primarily CaCO₃), containing preserved marine bioclasts
fossil
Fossilized bivalve or brachiopod shell
Indeterminate calcitic shell fossil; likely Bivalvia or Brachiopoda
fossil
Fossil scallop/bivalve shell
Fossilized pectinid bivalve; likely family Pectinidae (exact genus/species cannot be determined from the image)
fossil
Coral Fossil / Coral Fragment
Scleractinia / Calcium Carbonate (CaCO3)
fossil
Coral Skeleton / Fossil Coral
Scleractinia (Aragonite, CaCO3)
fossil
Elephant Molar Fragment (Fossil)
Proboscidea (Elephantidae) molar fragment
fossil
Fossil Coral (Rugose/Favosites)
Anthozoa (Rugosa or Tabulata)
fossil
Bivalve Fossil (Internal Mold)
Class Bivalvia (Indeterminate genus)
fossil
Favosites Fossil (Honeycomb Coral)
Favosites alpenensis
fossil
Fossil Coral (Rugose Coral)
Order Rugosa (Tetracorallia)
fossil
Honeycomb Coral Fossil (Favosites)
Favosites (Order Tabulata)
fossil
Amber
Succinite (approximate formula C10H16O)
mineraloid
Red Sandstone (Iron-rich Sandstone)
Clastic Sedimentary Rock - Quartz Arenite / Arkose with Hematite Cement
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone (likely Quartzose)
Sandstone (Principally SiO2)
sedimentary
Fossilized Coral (Rugose or Tabulate Coral)
Phylum Cnidaria, Class Anthozoa (silicified or calcified coral fossil)
fossil
Petrified Wood
Silicified Wood (primarily quartz/chalcedony replacing organic wood structures, SiO2)
fossil
Petoskey Stone
Hexagonaria percarinata
fossil
Fossilized Oyster Shell
Ostrea / Exogyra (Phylum Mollusca)
fossil
Amber
Succinite (Resinite)
Organic Crystal (Mineraloid)
Chert Nodule in Limestone
Microcrystalline Quartz (SiO2)
sedimentary
Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Ferruginous Sandstone (Gozzan/Ironstone)
Arenite with Limonite/Goethite cement (FeO(OH)·nH2O)
sedimentary
Sandstone (with Feldspathic/Arkose qualities)
Arenite (primarily SiO2 with KAlSi3O8 components)
sedimentary
Sandstone (Greywacke)
Arenite / Lithic Wacke (SiO2 predominant)
sedimentary
Limestone (specifically Chalky Limestone)
Calcium Carbonate (CaCO3 / Calcite)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary